The World Health Organization says the best way to prevent Zika is to not get bitten by mosquitoes infected with the virus, but Consumer Reports said just any insect repellent won't do the trick.

The most important thing to know from this latest round of testing? Natural isn't always better.

Consumer Reports looked at six natural repellents -- meaning the active ingredients are derived from plants instead of chemicals -- and found that five of them only protected the wearer against mosquitoes for an hour at the most.

But one natural repellent, Repel Lemon Eucalyptus, was found to give at least seven hours of protection against Aedes mosquitoes, which are known to carry Zika.

For some, this will be the second time in their lifetime that the falls have dried.

In 1969 researchers stopped the flow of water to study the effects of erosion and buildup of rock at the base of the falls. That year, people traveled from all over the world to see the landmark de-watered.

According to The Buffalo News, the New York State parks system wants to halt the water on the American side of the falls to replace two 115-year-old stone arch bridges that allow pedestrians, park vehicles and utilities access to Goat Island. Officials have said the concrete bridges, built in 1901, are deteriorating. A renovation would improve safety and the overall look of the popular site.

In 2004, the concrete arch bridges were closed and temporary truss bridges were put in place for parkgoers to cross over the rapids. Ten years later, the temporary bridges, which block views of the falls and are aesthetically unappealing for visitors, are still in place.

Officials now want to replace the two stone arch bridges, a project that could take five to nine months and would cost between $21.6 million and $37.3 million, The Buffalo News reported.

"The biggest problem is coming up with the money to do this," said Niagara Falls historian Tom Yots. "These beautiful bridge designs go back to the beginning of the 20th century."

The park system's proposal will be presented at a public hearing Wednesday at the Niagara Falls Conference Center.

If approved, a cofferdam would be imposed to stop water from flowing on the American side and redirect it to flow down the Canadian side. About 85 percent of the Niagara River flows over Horseshoe Falls in Ontario, and 15 percent flows over the American Falls in New York.